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Tytuł:
An Analytical Study of Partially Strengthened Single End-Bearing Granular Pile Near the Top and Bottom
Autorzy:
Garg, Vaibhaw
Sharma, Jitendra Kumar
Solanki, Ashish
Powiązania:
https://bibliotekanauki.pl/articles/1845161.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
granular pile
DACT of GP
NSS
PLTB of GP
reinforced stone column
end-bearing GP
Opis:
Stone columns (or granular piles, GPs) are progressively being utilized for ground improvement, mostly for pliant edifice such as road mounds, oil depot, and so forth. The present analysis is done by introducing strengthening at both the ends of GP, i.e., bottom and top end so that the bulging problem will be solved and the beneficiary effect of the bearing stratum can be utilized by the bottom strengthening feature. Analysis of a single partially strengthened, at both top and bottom, end-bearing GP is presented in this article in terms of displacement affecting component for the top (DACT) of GP, percentage load transferred to the base (PLTB) of strengthened GP, and normalized shear stress (NSS). The PLTB of the strengthened GP was found to increase considerably. The NSS was found to reduce at the top end of GP and is found to be redistributed along the length of GP.
Źródło:
Studia Geotechnica et Mechanica; 2021, 43, 2; 99-115
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structured Analysis of Stainless Steel 316L Material of Micro-Forceps Used in Vitrectomy Surgery by Biomechanics Modeling
Autorzy:
Karaçalı, Ö.
Çetiner, D.
Powiązania:
https://bibliotekanauki.pl/articles/1194827.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.85.gp
02.70.Dh
Opis:
Micro-forceps are a promising minimally invasive means of grasping, peeling, pulling into the eye ball. However, there is currently a diversity of micro-forcep designs and application methods that have, primarily, been intuitively developed by the researchers. To enable the rational design of optimized micro-forcep devices, a greater understanding of human eye biomechanics under small deformations is required. The purpose of this study was to investigate the biomechanical analysis of micro-forceps which are tools for operations that require the microscopic manipulation of tissues in eye surgery conditions. Retinal microsurgery requires extremely delicate manipulation of retinal tissue where tool-to-tissue interaction exists. Behavior of a micro-forcep is analyzed in ANSYS under operation pre-load conditions in vitrectomy. The effect of numerical analysis was determination of strains and stresses in working part of the micro-forcep. Results of analysis indicate diverse values of strains and stresses distribution in working part of the micro-forcep depending on its geometry. With a change in the material, the friction force can be determined using the upper and lower boundaries of different materials to choose from. The results of this analysis are helpful for eye surgeons for clinical interest.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 180-182
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
#gp-locally closed sets and #gp-locally closed functions
Autorzy:
Alli, K.
Powiązania:
https://bibliotekanauki.pl/articles/1192853.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
locally closed set
#g-locally closed set
#gp-closed set and #gp-locally closed set
Opis:
The aim of this paper is to introduce and study #gp-locally closed sets. Basic characterizations and several properties concerning them are obtained. Further, #gp - locally closed function is also defined. Some of the properties are investigated.
Źródło:
World Scientific News; 2016, 59; 109-128
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real-Time Acousto-Optic Visualization of Ultrasonic Pulses in $TeO_2$
Autorzy:
Polishko, O.
Yurchenko, A.
Pilgun, Y.
Smirnov, E.
Powiązania:
https://bibliotekanauki.pl/articles/1383783.pdf
Data publikacji:
2015-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.20.Gp
43.35.Sx
Opis:
The ultrasonic beam features in ultrasonic and acousto-optic devices have a great impact on their characteristics and need to be studied. In the current work, a conventional optical visualization technique was extended to include spatial filtration of the light diffraction pattern and stroboscopic illumination of a unit under test. That enabled very weak light responses from ultrasonic waves to be observed. This technique was applied to studying propagation and reflection of ultrasonic pulses in the $TeO_2$ crystal, a body of the total internal reflection ultrasonic sensor. Analysis of visualization data has revealed an unexpected conversion of the shear horizontal wave radiated by the transducer into a longitudinal one on its normal reflection from the (001) face of the crystal, which is inexplicable as far as the plane wave theory is concerned. This finding requires further research to be confirmed and explained.
Źródło:
Acta Physica Polonica A; 2015, 127, 1; 132-134
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of different heat treatments on microstructure and mechanical properties of the martensitic Gx12CrMoVNbN9-1 cast steel
Wpływ parametrów obróbki cieplnej na mikrostrukturę Ii właściwości mechaniczne martenzytycznego staliwa Gx12CrMoVNbn9-1
Autorzy:
Golański, G.
Słania, J.
Powiązania:
https://bibliotekanauki.pl/articles/350940.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
obróbka cieplna
mikrostruktura
właściwości mechaniczne
staliwo GP91
heat treatment
microstructure
mechanical properties
GP91 cast steel
Opis:
The paper presents a research on the influence of multistage heat treatment with the assumed parameters of temperature and time on the microstructure and mechanical properties of high-chromium martensitic GX12CrMoVNbN9-1 (GP91) cast steel. In the as-cast state GP91 cast steel was characterized by a microstructure of lath martensite with numerous precipitations of carbides of the M23C6, M3C and NbC type, with its properties higher than the required minimum. Hardening of the examined cast steel contributes to obtaining a microstructure of partly auto-tempered martensite of very high strength properties and impact strength KV on the level of 9-15 J. Quenching and tempering with subsequent stress relief annealing of GP91 cast steel contributed to obtaining the microstructure of high-tempered lath martensite with numerous precipitations of the M23C6 and MX type of diverse size. The microstructure of GP91 cast steel received after heat treatment was characterized by strength properties (yield strength, tensile strength) higher than the required minimum and a very high impact energy KV. It has been proved that GP91 cast steel subject to heat treatment No. 2 as a result of two-time heating above the Ac3 temperature is characterized by the highest impact energy.
W pracy przedstawiono badania wpływu wieloetapowej obróbki cieplnej przy założonych parametrach temperaturowo - czasowych na mikrostrukturę i właściwości mechaniczne wysokochromowego, martenzytycznego staliwa GX12CrMoVNbN9-1(GP91). W stanie lanym staliwo GP91 charakteryzowało się mikrostruktura martenzytu listwowego z licznymi wydzieleniami węglików typu M23C6, M3C i NbC o właściwościach wyższych od wymaganego minimum. Hartowanie badanego staliwa przyczynia sie do uzyskania mikrostruktury częściowo samoodpuszczonego martenzytu, o bardzo wysokich właściwościach wytrzymałościowych i udarności KV na poziomie 9_15 J. Ulepszanie cieplne z następnym wyżarzaniem odprężającym staliwa GP91 przyczyniła się do uzyskania mikrostruktury listwowego martenzytu wysokoodpuszczonego, z licznymi, o zróżnicowanej wielkości wydzieleniami typu M23C6 i MX . Uzyskana droga obróbki cieplnej mikrostruktura staliwa GP91 charakteryzowała sie właściwościami wytrzymałościowymi (granica plastyczności, wytrzymałością na rozciąganie) wyższymi od wymaganego minimum i bardzo wysoka udarnoącią KV. Wykazano, ze staliwo GP91 poddane obróbce No. 2 w wyniku dwukrotnego nagrzewania powyżej temperatury Ac3 charakteryzuje się najwyższą udarnością.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 1; 25-30
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zika virus infections from the perspective of the general practitioner
Autorzy:
Gańczak, Maria
Powiązania:
https://bibliotekanauki.pl/articles/551993.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
Tematy:
Zika virus
infection
clinical manifestation
diagnosis
prevention
GP.
Źródło:
Family Medicine & Primary Care Review; 2016, 4; 487-491
1734-3402
Pojawia się w:
Family Medicine & Primary Care Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kształtowanie otoczenia dróg krajowych klasy GP w programie przekształceń sieci drogowej
Shaping environment of national roads GP class in the program of road network transformation
Autorzy:
Tracz, M.
Powiązania:
https://bibliotekanauki.pl/articles/144746.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:
drogi klasy GP
otoczenie drogi
zagospodarowanie terenu
kryteria dostępności
roads of GP class
road environment
land use
accessibility criteria
Opis:
Koncentracja uwagi na najważniejszych inwestycjach drogowych, tj. na budowie autostrad i dróg ekspresowych powoduje, że procesy zachodzące na drogach klasy GP i w ich otoczeniu nie są dostrzegane. Konieczne jest zwrócenie uwagi na zagospodarowanie otoczenia tych dróg, co może być realizowane wspólnym wysiłkiem administracji drogowej oraz samorządowej. Ważna jest racjonalizacja dostępności do tych dróg przy wzięciu pod uwagę opisanych kryteriów dostępności i ochrony przed hałasem.
Concentration of attention on most important projects such as construction of motorways and expressways, causes processes occurring on the roads GP class and within their environment imperceptible. It is necessary to pay attention on land use in this road environment what may be done with join effort of road administration and local administration. Rationalization of accessibility to the roads is important taking into account described accessibility criteria and noise protection.
Źródło:
Drogownictwo; 2017, 11; 369-374
0012-6357
Pojawia się w:
Drogownictwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laguerre polynomial solutions of a class of initial and boundary value problems arising in science and engineering fields
Autorzy:
Gürbüz, B.
Sezer, M.
Powiązania:
https://bibliotekanauki.pl/articles/1061583.pdf
Data publikacji:
2016-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
02.30.Gp
02.30.Hq
02.70
Opis:
In this study, we consider high-order nonlinear ordinary differential equations with the initial and boundary conditions. These kinds of differential equations are essential tools for modelling problems in physics, biology, neurology, engineering, ecology, economy, astrophysics, physiology and so forth. Each of the mentioned problems are described by one of the following equations with the specific physical conditions: Riccati, Duffing, Emden-Fowler, Lane Emden type equations. We seek the approximate solution of these special differential equations by means of a operational matrix technique, called the Laguerre collocation method. The proposed method is based on the Laguerre series expansion and the collocation points. By using the method, the mentioned special differential equations together with conditions are transformed into a matrix form which corresponds to a system of nonlinear algebraic equations with unknown Laguerre coefficients, and thereby the problem is approximately solved in terms of Laguerre polynomials. In addition, some numerical examples are presented to demonstrate the efficiency of the proposed method and the obtained results are compared with the existing results in literature.
Źródło:
Acta Physica Polonica A; 2016, 130, 1; 194-197
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Incidence of respiratory tract infections and antibiotic use in primary health care
Autorzy:
Pietrzykowska, Małgorzata
Nowicka-Sauer, Katarzyna
Gutknecht, Piotr
Siebert, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/553127.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
Tematy:
respiratory tract infections
antimicrobial therapy
general practitioner (GP).
Źródło:
Family Medicine & Primary Care Review; 2016, 3; 332-335
1734-3402
Pojawia się w:
Family Medicine & Primary Care Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurements and Acoustic Analyses of Infrasound Noise Emitted by Operation of Small, Building Mounted Wind Farm
Autorzy:
Pierzga, R.
Boczar, T.
Wotzka, D.
Powiązania:
https://bibliotekanauki.pl/articles/1401871.pdf
Data publikacji:
2015-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.28.Dm
88.50.gp
88.50.jj
Opis:
Operation of modern wind turbines generates infrasound noise which is known as potentially harmful for humans. In presented study, measurements of infrasound noise generated by operation of five vertical axis, building mounted, small wind turbines were conducted. Measurements were taken in urban area at several points and different distances from the installation. Analyses were performed to determine the level of emitted infrasound noise in vicinity of the installation. Comparative analyses were carried out and the achieved results were referred to the limits of sound pressure intensity level of infrasound signals as specified for the working environment in accordance with the Polish standard PN-Z-01338.
Źródło:
Acta Physica Polonica A; 2015, 128, 3; 294-298
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Generalized Landau Levels
Autorzy:
Krasoń, P.
Milewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1032409.pdf
Data publikacji:
2017-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.-w
03.50.De
02.30.Gp
Opis:
We consider the dispersion of energy levels for both standard and inverted quantum harmonic oscillators in the presence of a uniform electromagnetic field. For this analysis we use a solution of the corresponding eigenproblem in terms of the Kummer functions. We find a complete description of the energy levels for a particle of mass m and electric charge q subject to the action of a harmonic oscillator and simultaneous uniform magnetic and electric fields. We also analyze the effect of spin on energy levels for an electron.
Źródło:
Acta Physica Polonica A; 2017, 132, 1; 94-96
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Research on Structured Analysis of Biomaterial of Dental Implant in Computer Aided Biomechanical Engineering Modelling
Autorzy:
Karaçalı, Ö.
Powiązania:
https://bibliotekanauki.pl/articles/1181969.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
83.50.-v
87.85.gp
02.70.Dh
Opis:
The research explained in this paper is about the mechanical principle applications on regulated form and function, forces, motion of teeth and dental implant - influencing the implant length and bone quality - in biomechanics engineering modeling in dentistry. The non-linear finite element method was employed as an advanced computer technique of structural stress analysis tool for biomechanics modeling using mechanical, mathematical, and biological definitions and concepts. A finite element model of dental implant with accurate geometry and material properties was developed to make realistic investigations on the implant biomaterial properties and mechanical behavior of new dental implant. The finite element models with non-linear contact elements were used to simulate an interface fixation within the implant system and the sliding function of the non-rigid connector. This research showed that implant design influences force transmission characteristics in peri-implant bone and mechanical signals affect bone tissue differentiation. Hence, it is important to control biomechanical loads on dental implants to maintain osseointegration and to promote early bone-implant interface healing. The results of this analysis are helpful for implant biomaterial selection and design for clinical interest.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 186-188
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Vibro-Acoustic Signals Generated during Operation of Micro Wind Turbines
Autorzy:
Wotzka, D.
Boczar, T.
Malec, T.
Pierzga, R.
Powiązania:
https://bibliotekanauki.pl/articles/1399411.pdf
Data publikacji:
2013-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
88.50.jj
88.50.gp
43.40.At
Opis:
Results of a measurement and analysis of vibro-acoustic signals generated by two low power vertical-axis wind turbines that are installed on the roof of the Electric Power Institute at Opole University of Technology are presented in the paper. The study considers a Darrieus and a Savonius type wind turbines of rated power 1 kW each. For registration of the vibrations of the turbine mast three uniaxial accelerometers and a measurement equipment from Brüel & Kjær were applied. The measurement setup is presented in the paper. A comparative analysis of the registered data in the time and time-frequency domains was performed. Results depict changes in the recorded signals in time and frequency under different meteorological conditions, i.e. for different wind speed values. Based on the achieved results significant differences in the mast vibrations of the two kinds of wind turbines were stated.
Źródło:
Acta Physica Polonica A; 2013, 124, 3; 595-597
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Use of Combined Multicriteria Method for the Valuation of Real Estate
Autorzy:
Kozioł-Kaczorek, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/429897.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet w Białymstoku. Wydawnictwo Uniwersytetu w Białymstoku
Tematy:
real estate
value of real estate
AHP
GP
multicriteria agricultural valuation
Opis:
A considered problem is a valuation of real estate. It is important to specify their exact market value, which is the result of several factors. Valuation of property is made on the basis of information and transactions on the local market. Moreover, the valuation always is based on the data of the similar properties. A comprehensive set of data is needed for these reasons. It is quite confusing because the number of transactions on the local market often is not sufficient. The purpose of this paper is to present a method for multicriteria valuation of real estate. This procedure is based on the Analytic Hierarchy Process (AHP) and the Goal Programming (GP). It was designed especially for valuation in situation in which information are limited. The proposed method was used for the valuation of the real estate located on Warsaw.
Źródło:
Optimum. Economic Studies; 2014, 5(71)
1506-7637
Pojawia się w:
Optimum. Economic Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Signal transducer and activator of transcription STAT3 plays a major role in gp130-mediated acute phase protein gene activation.
Autorzy:
May, Petra
Schniertshauer, Ute
Gerhartz, Claudia
Horn, Friedemann
Heinrich, Peter
Powiązania:
https://bibliotekanauki.pl/articles/1043431.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
immediate early genes
STAT transcription factors
acute phase proteins
gp130
Opis:
Interleukin-6 is a potent inducer of acute-phase response gene transcription. The intracellular signal transduction mechanisms by which this and other biological effects of the cytokine are achieved include activation of the JAK-STAT signaling pathway. More specifically, activation of the signal transducers and activators of transcription STAT1, 3, and 5 in response to IL-6 has been described. We examined the relative potency of these three STAT factors for the activation of acute-phase gene promoters in HepG2 cells in a reporter gene-based assay, where specific STAT factors could be activated via recombinant receptor constructs bearing different STAT-recruiting modules. These experiments indicate that amongst the STAT factors known to be activated by IL-6 STAT3 is the most potent activator of acute-phase gene transcription.
Źródło:
Acta Biochimica Polonica; 2003, 50, 3; 595-601
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 34

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